package com.company;

import java.io.*;

/**
 * Created by asus on 2017/8/25.
 */
public class BufferedInputFile {
    public static String read(String filename) throws IOException{
        BufferedReader in = new BufferedReader(new FileReader(filename));
        String s;
        StringBuilder sb = new StringBuilder();
        while((s = in.readLine())!= null)
            sb.append(s + "\n");
            in.close();
            return sb.toString();
    }
    public static void main(String[] args) throws IOException{
        System.out.println(read("D:\\test.txt"));
    }
}
